eng Science and Education Publishing American Journal of Water Resources 2333-4819 2025-09-19 13 4 121 128 10.12691/ajwr-13-4-1 AJWR20251341 article COULIBALY L谷r谷yaha lereyaha.coulibaly@uni-man.edu.ci 1 OUATTARA Isma?la 1 YAO Kouadio Assemien Fran?ois 1 OUEDRAOGO Moussa 1 DIALLO Seydou DAO Amidou 2 SORO Gneneyougo Emile 2 KAMAGATE Bamory 2 Department of Mines and Reservoirs, Training and Research Unit in Geological and Mining Sciences, University of Man, Man; C?te d'Ivoire Geosciences and Environment Laboratory, Training and Research Unit in Environmental Sciences and Management, Nangui Abrogoua University, Abidjan, C?te d'Ivoire This study investigates the variability of climatic parameters, specifically rainfall, in the Mountain District of Côte d＊Ivoire. It utilizes satellite-based rainfall data spanning from 1961 to 2020, complemented by observational data from SIEREM (Système d'Informations Environnementales sur les Ressources en Eau et leur Modélisation) database for the period 1961每2000. A preliminary processing of the rainfall datasets was conducted to correct biases and address data gaps. The methodological framework combines statistical change-point detection tests (Cusum (Cummulative Sum) and Student＊s t-test) with trend analysis techniques (Mann-Kendall and linear regression). Results from the change-point tests indicate no statistically significant discontinuities in the rainfall time series. However, trend analyses suggest a non-significant overall decline in precipitation across all monitoring stations. Notably, a marked reduction in monthly rainfall totals during May and June was observed, potentially offset by increased precipitation from August to October. Decadal analysis of annual cumulative rainfall over six decades reveals that precipitation consistently exceeded 1,000 mm, except at the Kouibly and Semien stations, where totals ranged from 922 mm to 981 mm during the decades 1971每1980, 1991每2000, and 2011每2020. Spatial analysis of rainfall isohyets highlights a heterogeneous distribution across the district, with rainfall patterns exhibiting an East每West gradient. https://pubs.sciepub.com/ajwr/13/4/1/ajwr-13-4-1.pdf rainfall variability mountain regions precipitation trends C?te d＊Ivoire